Tag Archives: electric field

Electric potential: “Electric potential at a point in electric field is the amount of work done to bring the unit positive charge from infinity to that point.” The gravitational potential at point in the gravitational field is the gravitational potential energy of a unit mass placed at that point.In this way ,the electric potential at any point in the electric ...

Similarities: Both the electric and magnetic field depends inversely on square of distance between the source and field point. Both electric field and magnetic field are proportional to the source strength namely charge and current element respectively. Both obey superposition principle. Differences: According to Coulomb’s law,the electrostatic force between two point charges is directly proportional to the product of their ...

What is Electric Flux? “Total number of field lines passing through a certain element of area is called flux”. It may also be defined as “The scalar product of electric field intensity E and vector area A“. Electric flux formula It is denoted by Greek letter Φ. Φ=E.A Φ=EAcosθ Where θ is the angle between E and A.Electric flux is a scalar quantity. ...

What is the definition of Charge in physics? Electric charge is defined as:”An electrical property of matter that exists because of an access or a deficiency of electrons.” If you walk across a carpet in dry weather,you can draw a spark by touching a metal door knob.On a grander scale,lightning is familiar to everyone.Such phenomena suggest the vast amount of ...

What does Coulomb’s law mean? “Coulomb’s law states that force of attraction or repulsion between two electric charges is directly proportional to their magnitudes and inversely proportional to the square of distance between them”.It is mathematically explained as: Charles Agustin Coulomb (1736-1806) measured electrical attractions and repulsions quantitatively and deduced the law that governs them.His apparatus,shown in fig. This figure ...

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introduction to physics

Physics is an important and fundamental part of the physical sciences, in addition to its other disciplines as chemistry, astronomy, geology, etc. Physics is an experimental science and Scientific method emphasizes the need for accurate measurement of the various measurable characteristics of different phenomena or man-made objects. This site emphasizes the need through the understanding and practice of measuring and recording techniques and skills. Currently, there are three main frontiers of fundamental science. First, the world extremely large, the universe itself, radio telescopes gathered information from the other side of the universe and have recently detected, such as radio waves, the `` big bang firelight`` probably started off It standing universe almost 20 billion years ago. Second, the world of small extremely, the particles such as electrons, protons, neutrons, mesons and others. The third border is the world of complex matter. It is also the world of `` middle sized`` things, from molecules at one end of the earth to the other. This is all fundamental physics, which is the heart of science.
But what it is physical? according to a definition, physics is the study of matter, energy and the relationship between them. The study of physics is the investigation of such things as the laws of motion, the structure of space and time, nature and types of forces that hold different Together materials, the interaction between the different particles, the interaction of electromagnetic radiation with matter and so on.
In the late 19th century many physicist started believing that everything about physics has been discovered. However, on the beginning the 20th century many new experimental facts revealed that the laws made by previous researchers need modifications. Other researches gave birth to many new disciplines in physics as the nuclear physics that deals with atomic nuclei, particle physics that deals with the elementary particles that make up matter, relativistic mechanics that refers to speeds close to the light and the physics of solid state which is concerned with the structure and properties of solids, but this is not exhaustive.
Physics is the most fundamental of all sciences and other branches of science provides the basic principles and fundamental laws. This overlap of physics and other fields gave birth to new branches as physical chemistry, biophysics, astrophysics, physical health, etc. but also it plays an important role in the development of technology and engineering role.
Science and technology are a powerful force for change in the prospects of manking. The media and the media have brought rapid communications around the world in close contact with each other. Events in one part of the world immediately affect around the globe. We are living in the age of information technolgy. Computer networks are products developed chips from the basic ideas of physics. The chips are made from silicon. Silicon can be obtained from sand. It is up to cope make a sandcastle or computer out of it. So these were all fields and information physcis. And we are trying these all on this website